diff --git a/helm/oauth2-proxy/Chart.yaml b/helm/oauth2-proxy/Chart.yaml
index d75ef77a..21d01d05 100644
--- a/helm/oauth2-proxy/Chart.yaml
+++ b/helm/oauth2-proxy/Chart.yaml
@@ -1,5 +1,5 @@
 name: oauth2-proxy
-version: 7.8.3
+version: 7.9.0
 apiVersion: v2
 appVersion: 7.7.1
 home: https://oauth2-proxy.github.io/oauth2-proxy/
@@ -35,7 +35,7 @@ kubeVersion: ">=1.16.0-0"
 annotations:
   artifacthub.io/changes: |
     - kind: added
-      description: allow templates in annotations
+      description: allow requests to be directed to sidecar first
       links:
         - name: Github PR
-          url: https://github.com/oauth2-proxy/manifests/pull/256
+          url: https://github.com/oauth2-proxy/manifests/pull/270
diff --git a/helm/oauth2-proxy/README.md b/helm/oauth2-proxy/README.md
index 8a767862..a601af42 100644
--- a/helm/oauth2-proxy/README.md
+++ b/helm/oauth2-proxy/README.md
@@ -196,6 +196,7 @@ The following table lists the configurable parameters of the oauth2-proxy chart
 | `service.loadBalancerIP`                              | ip of load balancer                                                                                                                                                                                                                                              | `nil`                                                                            |
 | `service.loadBalancerSourceRanges`                    | allowed source ranges in load balancer                                                                                                                                                                                                                           | `nil`                                                                            |
 | `service.nodePort`                                    | external port number for the service when service.type is `NodePort`                                                                                                                                                                                             | `nil`                                                                            |
+| `service.targetPort`                                  | (optional) a numeric port number (e.g., 80) or a port name defined in the pod's container(s) (e.g., http)                                                                                                                                                                                                                              | `""`
 | `serviceAccount.enabled`                              | create a service account                                                                                                                                                                                                                                         | `true`                                                                           |
 | `serviceAccount.name`                                 | the service account name                                                                                                                                                                                                                                         | ``                                                                               |
 | `serviceAccount.annotations`                          | (optional) annotations for the service account                                                                                                                                                                                                                   | `{}`                                                                             |
@@ -357,3 +358,6 @@ config:
     whitelist_domains = [ ".domain.com", ".example.io"]
     provider = "google"
 ```
+
+## Route requests to sidecar container
+You can route requests to a sidecar container first by setting the `service.targetPort` variable. The possible values for the targetPort field of a Kubernetes Service can be either a port number or the name of a port defined in the pod. By default, the service's `targetPort` value equals to `httpSchema`'s.
\ No newline at end of file
diff --git a/helm/oauth2-proxy/templates/service.yaml b/helm/oauth2-proxy/templates/service.yaml
index e8d02aeb..ab63c0da 100644
--- a/helm/oauth2-proxy/templates/service.yaml
+++ b/helm/oauth2-proxy/templates/service.yaml
@@ -36,7 +36,7 @@ spec:
 {{- end }}
   ports:
     - port: {{ .Values.service.portNumber }}
-      targetPort: {{ .Values.httpScheme }}
+      targetPort: {{ .Values.service.targetPort | default .Values.httpScheme }}
       {{- if (and (eq .Values.service.type "NodePort") (not (empty .Values.service.nodePort))) }}
       nodePort: {{ .Values.service.nodePort }}
       {{- end }}
diff --git a/helm/oauth2-proxy/values.yaml b/helm/oauth2-proxy/values.yaml
index c9ef103e..1487ae85 100644
--- a/helm/oauth2-proxy/values.yaml
+++ b/helm/oauth2-proxy/values.yaml
@@ -153,6 +153,8 @@ service:
   externalTrafficPolicy: ""
   # configure internalTrafficPolicy
   internalTrafficPolicy: ""
+  # configure service target port
+  targetPort: ""
 
 ## Create or use ServiceAccount
 serviceAccount: